Electric lock



(No Model.)

0. B. BEERS 81; W. B. TUTTLE.

ELECTRIC LOOK. No. 430,764. Patented June 24, 1890.

I UNITED STATES PATENT Trice.

CHARLES E. BEERS AND \VILLIAM B. TUTTLE, OF BRIDGEPORT, CONNECTICUT.

ELECTRIC LOCK.

SPECIFICATION forming part of Letters Patent No. 430,764, dated June 24,1890.

Application filed November 16, 1889. Serial No. 330,561. (No model.)

T0 on whom it may concern.-

useful improvements in looks and latches, but

more particularly refers to latches which are operated by the usualknob-and-spindle attaohment.

The object of our present, invention is to improve upon the constructionshown and described in Letters Patent No. 396,723 issued January 29,1889, to Charles B. Beers.

In the accompanying drawings, Figure 1 is a plan of an ordinary Nilesdoor-lock with the casing removed and showing our improvement as itappears in connection with said look when the latch -operating tumbleris locked; and Fig. 2, a similar view, but showing the said tumblerunlocked.

Similar letters denote like parts in both figures of the drawings.

A is the lock-casing; B, the latch; C, the latch-spindle; D, thelatch-operating tumbler, having a nose E, which engages with the heel ofthe spindle C, whereby when the said tumbler is thrown back the latchwill be withdrawn; F, a spring which bears against the rear of thespindle, whereby the movement of the latch is rendered resilient, and Gis a spring which bears against the heel of the tumbler D and causes thelatter to return to normal position after the latch has been withdrawn.All these parts above set forth constitute the latch-operating mechanismof the Niles lock, and we will now proceed to describe our invention andthe use thereof in connection with said mechanism.

H is an oscillatory block pivoted at a to the casing, and I thetumbler-block loosely pivoted around a stud l), proj ectingfrom theblock, said tumbler-block being guided in ways J,

cast with the casing. 3y swinging the block up and down the bolt iscaused to shoot behind and away from the shoulder K on the tumbler, thuslocking and unlocking the latter, as will be clearly seen from thedrawings. A spring L bears against the stud c at the lower end of theblock H, whereby the bolt is shot with a spring action behind theshoulder K.

M is the operating-lever, pivoted at (Z to the casing and abutting atone end against the bottom of the lower end of the block Ill.

N is a spring secured to the casing and the bottom of a stud c,projecting from this abutting end of the lever, whereby saidendisnormally sustained in elevation... This spring N is more powerfulthan the spring L, the result being that when said spring N is allowedto perform its function the bolt I will be withdrawn in the manner shownat Fig. 2. The other end of the leveris provided with a shoulder f, anda pin 9 projects upward from said lever at a point between said shoulderand the pivotal point of the lever.

O is a cross-pin secured to the latch-spindle, and extending laterallybeyond the pin 9 so that when the latch is withdrawn the crosspin willstrike said pin g, and thereby swing the lever M, so as to throw theshoulder fupward and the stud c downward, for the purposes presentlyexplained. Of course it will be clearly seen that when the stud c isdepressed thespring L will act to throw the belt I behind the shoulder Kto lock the tumbler D.

P is'an ordinary magnet secured within the casing, the coil-wires beingrun to any suitable and ordinary push-button circuit-closer.

Q is an L-shaped armature, pivoted at h to the casing so as to swingfreely. One leg of this armature is within the field of the magnetP,while the other end is provided with a hook i.

R is a spring secured to the armature and bearing against a post S, castwith the casing, the tendency of said spring being to throw the armatureaway from the magnet, whereby the lower leg of said armature is throwntoward the lever M. The relative positions of the hook t' and shoulder fare such thatwhen said shoulder is thrown upward said hook will latchbeneath the shoulder, and thcrebyhold the lever M against the face ofthe spring N, as shown at Fig. 1. The operation of ourimprovement is asfollows: The parts being in the position shown in Fig. 1, thelatch-operating tumbler D is of course locked; but if the magnet bevitalized by closing the circuit the armature will be attracted, therebyreleasing the shoulder f, and causing the lever M to operate by reasonof the spring action to retract the bolt I, so that the tumbler D may beoperated to withdraw the latch B. Now as the latch is thus withdrawn thecrosspin 0 will strike the pin g, whereby the shoul- (ler f is thrown upand engaged with the hook 1' and the other end of the lever forced downto permit the spring L to throw the bolt 1 bebind the shoulder K on thetumbler, whereby the latter is locked.

We do not wish to be understood as claiming, broadly, the feature of thelatching-armature or of the intermediate lever, which establishesconnection between said armature and the locking mechanism, since we areaware that this is not new; but we have shown a very simpleconstruction, and we desire that the following claims for our specificconstruction may be granted us:

1. The combination of the latch-spindle C, the tumbler D, havingshoulder K, the bolt I, the pivoted-block H, having studs 1) 0, springL, whereby said bolt and shoulder are engaged, lever M, having stud e atone end and shoulder f at the other, said lever being pivoted to thelock-casing, spring N, whereby the lever is normally elevated and saidbolt withdrawn, pin g, projecting upward from said lever, crosspin 0,extending laterally from the spindle beyond the pin 9 and adapted toabut against the latter to operate the lever when the latch isretracted, L-shaped armature having ahook i on the lower leg adapted toengage with the shoulder f, the upper leg being within the field of themagnet P, secured in the casing, and spring R, secured to said armatureand bearing against the post S, substantially as shown and described.

2. In an electrically-controlled latch, the combination, with thelatch-spindle and the knob-tumbler which operates said spindle, of asliding bolt adapted to engage with and lock said tumbler, a resilientpivoted block, which normally operates to throw said bolt into lookingengagement with said tumbler, a pivoted resilient lever, one end ofwhich engages with said block to normally operate the latter, wherebysaid bolt is withdrawn from said tumbler, the other end being providedwith a hook, a projection from the latch-spindle, adapted when thelatter is retracted to abut against the said lever and raise the hookend thereof, and a pivoted spring-actuated L-shaped armature whose upperleg is within the field of a magnet secured within the latch-casing, andwhose lower leg is provided with a hook adapted to engage with the hookon said lever, substantially as and for the purposes set forth.

In testimony whereof we afiix our signatures in presence of twowitnesses.

CHARLES B BEERS. 7 WILLIAM B. TUTTLE. WVitnesses:

. F. XV. SMITH, J r.,

JNo. S. FINcH.

